One Direction 'This Is Us' Official Movie Trailer Released [WATCH], 'Little Things' Group Announce New Single 2013 'Best Song Ever' and Take Over Twitter [VIDEO]

One Direction have followed in the footsteps of Justin Bieber, Katy Perry and the Jonas Brothers by making a concert movie. After teasers were posted last week, the official trailer for This Is Usdropped today (June 25).

In the same vein as Part of Me and Never Say Never, the 1D concert movie will focus on the U.K. group's rise to fame. The five-piece have come from working class backgrounds, and rising through working at bakeries and other retail outlets to become one of the biggest acts in the world.

Of course, that couldn't have been possible without the X Factor, but as Simon Cowell says in the trailer, the fans are the ones who decided that 1D were going to be as big as they've become.

Candid video of One Direction hanging out, playing pranks and connecting with their family and their past is interspersed between live footage from their performance at London's famous O2 Arena.

Watch the official movie trailer for One Direction: This Is Us below:

A movie trailer isn't the only thing 1D fans have to obsess over for the next few days. Before the This Is Us trailer made its debut, the "Little Things" group announced a new single: "Best Song Ever." The song can be heard near the end of the trailer.

The humbly titled "Best Song Ever" was recorded to be released alongside the movie, and will be available for preorder at midnight tonight. From the snippet in the trailer, "Best Song Ever" appears to be light, danceable 1D fare. Lyrics "And we can dance all night to the best song ever," can be heard clearly in the This Is Us trailer.

Watch the "Best Song Ever" announcement:

Fans are clearly excited about the upcoming movie tie-in. #BestSongEver quickly rose to the top of Twitter's trending topics this morning following 1D's video. The single will come out on July 22.

One Direction: This Is Us will be released in the U.S. on Aug. 30.